[jax-rs-spec users] [jsr339-experts] Re: Re: Re: Remove @ManagedAsync Re: Re: Re: Latest async API changes

From: Bill Burke <>
Date: Mon, 13 Aug 2012 10:50:49 -0400

On 8/13/2012 10:28 AM, Santiago Pericas-Geertsen wrote:
> On Aug 13, 2012, at 10:08 AM, Bill Burke wrote:
>>>> Can't you see it is the *SAME EXACT THING* and that there is nothing
>>>> gained here? So instead of configuring and managing just one
>>>> thread pool, you want users to managed and configure 2 thread pools?
>>>> Just doesn't make sense...just add more threads to your servlet
>>>> container's thread pool if CPU is not utilized and you have waiting
>>>> HTTP requests.
>>> It is and it isn't. Theoretically, yes, practically, no. There are
>>> many other containers that are running and it's just impractical to
>>> let one run over and take all the threads in the system. Once you
>>> partition your system resources (for EJB, JMS, etc) you want to use
>>> the threads for the specific task for which they were allocated. The
>>> problem of configuring multiple thread pools is already present in
>>> any EE installation.
>> I've run this by numerous people within Red Hat on our web, remoting,
>> messaging, and app server teams. Everybody is unanimous that this is
>> not a useful feature and in fact almost an anti-pattern. You may
>> think you are solving a problem here, but all you are really doing
>> with @ManagedAsync is shuffling request processing from one thread
>> pool, to another.
> I understand, it's a difference of opinion and experience I guess.
> IMO, JAX-RS is one of many web technologies and as such should not
> dictate how the web container manages its threads (or how big the thread
> pool is, etc.).

JAX-RS does not place any restrictions on how the web container manages
it threads.

> Would you agree to make this feature optional in JAX-RS?

No. I just haven't heard any argument yet that it solves any problem.
Except for you and Marek, I haven't talked to one person that agrees its
a good idea.

Bill Burke
JBoss, a division of Red Hat